Linux/AM5728: How to configure AM5728 as two PCIe RC single lane RCs

I've found further on down in the file a reference that looks like it can be configured to be the second RC in axi@1:


axi@1 {
compatible = "simple-bus";
#size-cells = <1>;
#address-cells = <1>;
ranges = <0x51800000 0x51800000 0x3000
0x0 0x30000000 0x10000000>;
status = "disabled";
pcie@51800000 {
compatible = "ti,dra7-pcie";
reg = <0x51800000 0x2000>, <0x51802000 0x14c>, <0x1000 0x2000>;
reg-names = "rc_dbics", "ti_conf", "config";
interrupts = <0 355 0x4>, <0 356 0x4>;
#address-cells = <3>;
#size-cells = <2>;
device_type = "pci";
ranges = <0x81000000 0 0 0x03000 0 0x00010000
0x82000000 0 0x30013000 0x13000 0 0xffed000>;
#interrupt-cells = <1>;
num-lanes = <1>;
linux,pci-domain = <1>;
ti,hwmods = "pcie2";
phys = <&pcie2_phy>;
phy-names = "pcie-phy0";
interrupt-map-mask = <0 0 0 7>;
interrupt-map = <0 0 0 1 &pcie2_intc 1>,
<0 0 0 2 &pcie2_intc 2>,
<0 0 0 3 &pcie2_intc 3>,
<0 0 0 4 &pcie2_intc 4>;
pcie2_intc: interrupt-controller {
interrupt-controller;
#address-cells = <0>;
#interrupt-cells = <1>;
};
};
};

I'm going to try setting this up as pcie2_rc in the axi@0 section.

No joy yet, any advise would be appreciated. Thanks.

Trying to get just the second pcie rc working. Disable pcie1_rc and enable just the SS2 configuration. The device driver fails. Here is a comparison between the working and the non working dmesg log output.

Working pcie1_rc (SS1):

[ 1.842894] pinctrl-single 4a003400.pinmux: 282 pins at pa fc003400 size 1128
[ 1.846509] PCI host bridge /ocp/axi@0/pcie_rc@51000000 ranges:
[ 1.846521] No bus range found for /ocp/axi@0/pcie_rc@51000000, using [bus
00-ff]
[ 1.846555] IO 0x20003000..0x20012fff -> 0x00000000
[ 1.846576] MEM 0x20013000..0x2fffffff -> 0x20013000
[ 1.848891] dra7-pcie 51000000.pcie_rc: PCI host bridge to bus 0000:00
[ 1.848905] pci_bus 0000:00: root bus resource [bus 00-ff]
[ 1.848916] pci_bus 0000:00: root bus resource [io 0x0000-0xffff]
[ 1.848927] pci_bus 0000:00: root bus resource [mem 0x20013000-0x2fffffff]
[ 1.848962] pci 0000:00:00.0: [104c:8888] type 01 class 0x060400
[ 1.849005] pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x000fffff]
[ 1.849027] pci 0000:00:00.0: reg 0x14: [mem 0x00000000-0x0000ffff]
[ 1.849092] pci 0000:00:00.0: supports D1
[ 1.849102] pci 0000:00:00.0: PME# supported from D0 D1 D3hot
[ 1.849356] PCI: bus0: Fast back to back transfers disabled
[ 1.849521] pci 0000:01:00.0: [10b5:8606] type 00 class 0x060400
[ 1.849551] pci 0000:01:00.0: ignoring class 0x060400 (doesn't match header t
ype 00)
[ 1.849791] PCI: bus1: Fast back to back transfers disabled
[ 1.849872] pci 0000:00:00.0: BAR 0: assigned [mem 0x20100000-0x201fffff]
[ 1.849886] pci 0000:00:00.0: BAR 1: assigned [mem 0x20020000-0x2002ffff]
[ 1.849899] pci 0000:00:00.0: PCI bridge to [bus 01]
[ 1.850136] pcieport 0000:00:00.0: Signaling PME through PCIe PME interrupt
[ 1.850146] pci 0000:01:00.0: Signaling PME through PCIe PME interrupt
[ 1.850158] pcie_pme 0000:00:00.0:pcie01: service driver pcie_pme loaded
[ 1.850313] aer 0000:00:00.0:pcie02: service driver aer loaded
[ 1.851267] backlight supply power not found, using dummy regulator

Failing pcie2_rc (using the axi@1 section, just add pcie2_rc tag to the pcie_rc configuration):

[ 1.842885] pinctrl-single 4a003400.pinmux: 282 pins at pa fc003400 size 1128
[ 1.846184] dra7-pcie 51800000.pcie: probe deferral not supported
[ 1.847099] backlight supply power not found, using dummy regulator

Hi Chris,

Thanks for sharing the solution.

Regards,
Pavel